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Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride
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Xiao-wei PAN, Gang WU, Mang WANG, Hong-zheng CHEN. Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride[J]. Journal of Zhejiang University Science A, 2009, 10(5): 710-715.
@article{title="Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride",
author="Xiao-wei PAN, Gang WU, Mang WANG, Hong-zheng CHEN",
journal="Journal of Zhejiang University Science A",
volume="10",
number="5",
pages="710-715",
year="2009",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0820736"
}
%0 Journal Article
%T Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride
%A Xiao-wei PAN
%A Gang WU
%A Mang WANG
%A Hong-zheng CHEN
%J Journal of Zhejiang University SCIENCE A
%V 10
%N 5
%P 710-715
%@ 1673-565X
%D 2009
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A0820736
TY - JOUR
T1 - Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride
A1 - Xiao-wei PAN
A1 - Gang WU
A1 - Mang WANG
A1 - Hong-zheng CHEN
J0 - Journal of Zhejiang University Science A
VL - 10
IS - 5
SP - 710
EP - 715
%@ 1673-565X
Y1 - 2009
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820736
Abstract: We report that the ultraviolet (UV) light induced photochromic behavior of layered organic-inorganic perovskite material of (C4H9NH3)2CuCl4, changed from yellow to brown after irradiation with UV light (10 mW/cm2) and partially recovered through storage in the dark. (C4H9NH3)2CuCl4 exhibited two distinct absorption bands centered at 286 nm (band I) and 384 nm (band II), which were attributed to the photo-induced exciton formed in 2D inorganic layers sandwiched by organic layers. The blue shift of band I from 287 to 269 nm as well as the decrease of the intensity of band I and band II could be found when samples were irradiated under UV light for different length of time. The simultaneous weakening of the intensity of the N−H···Cl hydrogen bond as well as the vibration of the long Cu−Cl bond in the distorted CuCl64− octahedron could be detected from the Fourier transform infrared (FTIR) spectra, which resulted the change of charge distribution of the dissymmetric Cl−Cu···Cl bond and the resulting photochromic behavior.
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